Amplifier



June 5, 1923. 1,457,814 H. l. BECKER AMPLIFIEH Filed Dec. 14;, 1921 2 Sheets-Sheet 1 Fig I.

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, A We 1 ka- Inv entor: v Howard I Becken y QM? His Attorney June 5 1923 1,457,814 H. i. BECKER AMPLIFIER Filed Dec. 14. 1921 2 Sheets-$heet B Invent or: Howard I. Becker,

His Attorney.

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Fetented dune 3: i923.

HGWAEIJ I. BEGKlfi-l, if SCHEHECTADY, HEW YORK, ASSIGNQR '20 GENERAL SQMPAETY, it GQBPGBATEON OF NEW YORK.

AEFLIEIER.

To all 107mm if may concern Be it known that l, Howiinn i. BECKER, a

citizen of the United States, residin Scl'i nectady, county of Schenectady, state of New lork, have invented certain new and useful Improvements in Amplifiers, of

which the following is a specification.

My present invention of the electron discharge type, more relates to amplifiers particularly to magnetically controlled amplifiers.

One of the OlljlZClS of my invention is to provide a simple and etiicient circuit connection or" magnetically controlled amplifiers an amplifying may A. more speclic chic-ct of my syse amplification oi small currents may be produced in a single device.

The novel features which 31 believe to be characteristic of my invention are set forth with particularity 11': the appended claims.

My invention, itself, however, organization and method of operation best be understood by reference to the lowing description taken in connection both as to its will fol- W ith the accompanying drawing in which Figs. 1,

Q-and 3 respectively sho. cuit organizations whereby my may be carried into three different cirinvention I have indicated in each figure of the drawing two electron dischsrgge amplifiers A and B, each of which comprises an evacua'ted receptacle 1.. enclosing a filamentary cathode 2 adapted to he heat-ed to incandescence by current from the on surrounding anode 4 which 1 cylindrical form arranged circular symmetry with cathode 2.

respect to r 1 fe'ierahly of in substantially the A polarizing: magnetic field for adjusting the normal current through. these devices to a point where small variations in the magnetic field produce correspondingly is large variations in .the current between cathode and anode. may be provided by means of the coils 5 and G. surrounding the recep: tools 1, which are supplied with current from a convenient Source such as the battery Each of the devices is provided with an output circuit which includes a common source of potential 8 for maintaining the electron discharge between cathode 2 anode 4.

The input circuit of amplifier A is and plied with the current to be amplified, which in the cases illustrated is the current received upon the receiving antenna 9. A tuning condenser is included in series with the antenna 9 and in shunt to the condenser 10-l provide a coil 11 which surrounds the receptacle 1. The output circuit of aniplilier 8 includes a coil 12, which surrounds the receptacle 1 of amplifier B. The output circuit of amplifier A therefore serves as an input circuit for the amplifier B. The output circuit of amplifier B includes a coil 13. which is coupled to a coil 1%, the coil 1% being included in a circuit which is tuned by means of variable con denser l5.

In the arrangement shown in Fig. l the tuned circuitwhich is associated with the output circuit of amplifier B includes a coupling coil 16 which is coupled by a variable coupling to the coil 1?, which is in series with the input coil ll of amplifier A. By means of this coupling amplified current variations produced in the output circuit of amplifier B are supplied to the input circuit of amplifier A. and reamplified by both devices A and B. The tuned circuit which includes coils i l and 16 and condenser may also include a coil 18 which is coupled to a coil 19 from which the amplified currents may be supplied to other apparatus such as a detector or additional amplifiers. By adjustment of the coupling between coils 16, 17, it is possible to secure a very high degree of amplification without causing the production of oscillations.

I have also shown an arrangement where by amplified currents may be supplied from the output circuit of sinplifier A. This arrangementcomprises a coil 20 which surrounds the receptacle 1 of amplifier B and is therefore in inductive relation to the coil 12. The circuit in which coil 20 is included also contains a variable condenser 21 for tuning purposes and. the coupling coil 22 which is coupled to the coil 23. Amplified currents may be supplied if desired lrom the coil 23 to other apparatus such as a detector or additional amplifiers.

In some cases it may be desirable to sup-' ply to the input circuit of the first amplifier amplified potential variations produced in the output circuit of either amplifier A or amplifier B. in Fig. 52-, l have shown an arrangement whereby this may he accomin this case the circuit which incluuee the coii 2 3 also includes a coupling coil which is coupled, by a variable coupling to ilic coii25, which is in series with he coil 11. in ceee the amplified variations 4 the outputcircuit of empiilier A are to be euppiicd to the input circuit of un1pliricr A the phase of such amplified variaone will not correspond with the phase of 1,. e original variations impressed from the uterine 9 upon coil. 11. 'ihisis due to the not an increase in the current in the input circuitof amplifier A produces e decrease in the current in the output circuit said amplifier. it will be necessary iiiereforc in this case to provide means for ad lueting the chase of the variations supplied limm output circuit of amplifier 1%. to the inpui circuit. Such. phase adjustment he provided by means of the vez'ieble condensers 26 and 2'? and the inductance 28, in the arrangement shown in Fig. 2, means is also provided for supplying toiiic, input circui: of amplifier A varietieiis produced in me output circuitof cm- E. This means comprises the coil which is coupled by variable coupling lo the coil 28.

in Fig, i have indiceted on arrange ment in which the veriuiions produced in the output circuits of amplifiers A and B be supplied by capacity coupling to the input circuit of amplifier A. In this case capacity couplings are provided between the coil 12 and. coil 20 by means of condenser 36, heivvecn coils 13 and 14 by means of condenser o1. The variable condensers 32 and 33 are inserted in the conductor 34, which is connected to one terminal of the coil 1dand one terminal of the iupui coil 11 of amplifier A. A switch 35 is also providediaud when this switch 35 is closed variations produced in the output circuit of bothamplifiers A. and will be supplied tothe input circuit of. amplifier A, and variations produced i ithe out-put circuit of amplifier B will be eupplied through the capecii-y coupling furnished by condenser 32 to the input circuitof amplifierll; proper adjustment of the condensers and the phase of the "variations supplied from the output circuits of devices A and B to the input circuits may-be given the proper rela- 1053,

While I have shown enddescribed a preferred embodiment oi my invention, it will be apparent that many modifications in the circuit connections employed may be made, and that as many devices as desired may be connected in. series relation Without departing from the scope of my invention as set forth in the appended clalme.

' What I claim as new desire to secure by Lett rs of the ilnited States, ie,--

i, The combinenon 1n ernplifying circuit for, said device which tem of a device having'two electrodes arranged in substantially circular symmetry to each other, means for producing an electron discharge between said electrodes, an input circuit for said device which com- 79 prises means for magnetically controlling the discharge between said electrodes, on output circuit in which the current carried by the discharge will flow, a second devicesimilar to the first. means associated with thcoutput circuit of the first device for magnetically controlling the electron discharge in the second device, an output, circuit for the second device, and means for impressing upon the input circuit of the 80 first device currentvariutions produced'in the output circuit of the second device.

2. The combination in an amplifying eye tern of a device having two electrodes on ranged in substantially circular symmetry to each other, means for producing an electron discharge between said electrodes, on input circuit for said device which -omprises means for magnetically controlling the discharge between said electrodes, an output circuit in which the current carried by the discharge will flow, a second device similar to the first, means associated with the output circuit of the first device for magnetically cont-rolling the electron discharge in the second device. on output circuit for the second device. and means for impressing upon the input circuit of the first device current variations produced in the output circuit of one of said devices.- 109 3. The combination in an amplifying system of :1 device having two electrodes arranged in substantially circular symmetry to each other. means for producing an electron discharge between said electrodes, an input 5 comprises means for magnetically controlling the discharge between said electrodes, an output circuit in which the current carried by the discharge will flow, a second device similar W3 to the first, means associated with the output circuit of the first device for magnetically controlling the electron discharge-in the second device, an output circuit .for the second device, a common source of current for the output circuits of the two devices, and menus for impressing upon the input circuit of the first device current variations produced in the output circuit of the second device.

4. The combination in an amplifying ws 1% tom of a device having two electrodes er ranged in substantially circular symmetry to each other, means for producing an electron discharge between seid electrodes, on in 113; circuit for said device which comprises means for magnetically controlling the discharge betweel said elecirodes, an output circuit in which the current curried by the discharge will flow, a second device similar to the first, means associated ith the output 13 .circuit of the first device for magnetically controlling the electron discharge in the second device, an output circuit for the second device, means for impressing upon the input circuit of the firstdevice current variations produced in the output circuit of the second device and means for adjusting the means for magnetically controlling the discharge between said electrodes, an output circuit in which the current carried by the discharge will flow, a second device simiiar to the first, means associated with the output circuit of the first device for magnetically controlling the electron discharge in the second device, an output circuit for the second device, means for impressing upon the-input circuit of the firm device current variations produced in the output circuit of one of said devices, and means for adjusting the phase of the current variations impressed upon the input circuit of the first device.

6. The combination in an amplifying sys tem of a device having two electrodes arranged in substantially circular symmetry to each other, means for producing an electron discharge between said electrodes, an input circuit for said device which comprises means for magnetically controlling the discharge between said electrodes,'an output I I I I v k I e Mn! I circuit in which the current earrlecxjf 'hy the discharge will flow, a second device siar I to the first, means associated with the output circuit of the first device for magnetically controlling the electron discharge in the seccnd device, an output circuit for the second device, a common source of current for the output circuits of the two devices, means for impressing upon the input circuit of the first device current variations produced in the output circuit -of the second device, and means for adjusting the phase of the current variations impressed upon the input circuit of the first device.

7. The combination in an amplifying system of a plurality of electron discharge devices, each of which has two electrodes arranged in substantially circular symmetry to each other, means for producing an eleotron discharge between the electrodes of each 1 of said devices, input and output circuits for each of said devices, each of said input circuits comprising means for magnetically controlling the discharge between the elecodes of the device with which it is assoed,'the output circuit of at least one of devices having associated therewith means for controlling the input circuit of another of said devices, said devices being connected in cascade for successive amplification, and means for impressing upon the input circuit of one of said devices-amplified current variations produced in the output circuit of a succeeding device.

In witness whereof, I have hereunto set my hand this 13th day of December 1921.

HOWARD 1. encircle.

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